$ git clone -n https://src.fedoraproject.org/rpms/gap-pkg-liering.git /var/lib/mock/f45-build-9525-405/root/chroot_tmpdir/scmroot/gap-pkg-liering
Cloning into '/var/lib/mock/f45-build-9525-405/root/chroot_tmpdir/scmroot/gap-pkg-liering'...
$ git fetch origin 5a16393d1e5a351b1af2f909a600e8db54ae82a2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gap-pkg-liering
 * [new ref]         5a16393d1e5a351b1af2f909a600e8db54ae82a2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5a16393 Use the GAP declarative buildsystem