$ git clone -n https://src.fedoraproject.org/rpms/libgsf.git /var/lib/mock/f41-build-857031-167860/root/chroot_tmpdir/scmroot/libgsf
Cloning into '/var/lib/mock/f41-build-857031-167860/root/chroot_tmpdir/scmroot/libgsf'...
$ git fetch origin 05053f6e5a730079b468bd8f4d652cca4bd1ee62:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libgsf
 * [new ref]         05053f6e5a730079b468bd8f4d652cca4bd1ee62 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 05053f6 1.14.53