$ git clone -n https://src.fedoraproject.org/rpms/schemesh.git /var/lib/mock/f42-build-59019396-6570271/root/chroot_tmpdir/scmroot/schemesh
Cloning into '/var/lib/mock/f42-build-59019396-6570271/root/chroot_tmpdir/scmroot/schemesh'...
$ git fetch origin 7b05356a9267c09a24d6b2c640f3076e7d38f728:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/schemesh
 * [new ref]         7b05356a9267c09a24d6b2c640f3076e7d38f728 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7b05356 Added missing buildrequires on chez-scheme that is needed for getting the version during build