$ git clone -n https://src.fedoraproject.org/rpms/gfan.git /var/lib/mock/f41-build-1020899-18021/root/chroot_tmpdir/scmroot/gfan
Cloning into '/var/lib/mock/f41-build-1020899-18021/root/chroot_tmpdir/scmroot/gfan'...
$ git fetch origin 7dec9a200b5ba0080cde4e8afca46ad9830e548a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gfan
 * [new ref]         7dec9a200b5ba0080cde4e8afca46ad9830e548a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7dec9a2 Rebuild for soplex 7.0.0