$ git clone -n https://src.fedoraproject.org/rpms/gfal2.git /var/lib/mock/f39-build-1503452-34973/root/chroot_tmpdir/scmroot/gfal2
Cloning into '/var/lib/mock/f39-build-1503452-34973/root/chroot_tmpdir/scmroot/gfal2'...
$ git fetch origin a5616387c23126d565a7109dfb0520524d0ed718:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gfal2
 * [new ref]         a5616387c23126d565a7109dfb0520524d0ed718 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a561638 Upgrade to upstream release 2.21.5