$ git clone -n https://src.fedoraproject.org/rpms/fetchmail.git /var/lib/mock/f41-build-842128-161567/root/chroot_tmpdir/scmroot/fetchmail
Cloning into '/var/lib/mock/f41-build-842128-161567/root/chroot_tmpdir/scmroot/fetchmail'...
$ git fetch origin 60827b4efc9393f29dd03b6f691b7987d23458f9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fetchmail
 * [new ref]         60827b4efc9393f29dd03b6f691b7987d23458f9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 60827b4 Update to fetchmail-6.4.39