$ git clone -n https://src.fedoraproject.org/rpms/cosmic-greeter.git /var/lib/mock/f43-build-59082837-6570944/root/chroot_tmpdir/scmroot/cosmic-greeter
Cloning into '/var/lib/mock/f43-build-59082837-6570944/root/chroot_tmpdir/scmroot/cosmic-greeter'...
$ git fetch origin 5e4fd012abfbdadfe5057d7e45c6dc67f4fa3873:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cosmic-greeter
 * [new ref]         5e4fd012abfbdadfe5057d7e45c6dc67f4fa3873 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5e4fd01 "Update to 1.0.0~alpha.7"