$ git clone -n https://src.fedoraproject.org/rpms/afflib.git /var/lib/mock/f41-build-710626-13019/root/chroot_tmpdir/scmroot/afflib
Cloning into '/var/lib/mock/f41-build-710626-13019/root/chroot_tmpdir/scmroot/afflib'...
$ git fetch origin 9b636b0cbc2fd86fbdea53570e56b6abe0e1b918:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/afflib
 * [new ref]         9b636b0cbc2fd86fbdea53570e56b6abe0e1b918 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9b636b0 Update upstream snapshot