$ git clone -n https://src.fedoraproject.org/rpms/python-libarchive-c.git /var/lib/mock/f43-build-60921916-6585896/root/chroot_tmpdir/scmroot/python-libarchive-c
Cloning into '/var/lib/mock/f43-build-60921916-6585896/root/chroot_tmpdir/scmroot/python-libarchive-c'...
$ git fetch origin 8362551546ce3d11efad1307c43eb823dbb52be5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-libarchive-c
 * [new ref]         8362551546ce3d11efad1307c43eb823dbb52be5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8362551 Version 5.3