$ git clone -n https://src.fedoraproject.org/rpms/gnustep-base.git /var/lib/mock/f41-build-1200359-22413/root/chroot_tmpdir/scmroot/gnustep-base
Cloning into '/var/lib/mock/f41-build-1200359-22413/root/chroot_tmpdir/scmroot/gnustep-base'...
$ git fetch origin 8a51554c7c60485371859bb1fbdf3b86017e06de:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnustep-base
 * [new ref]         8a51554c7c60485371859bb1fbdf3b86017e06de -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8a51554 Fix gnustep-make name