$ git clone -n https://src.fedoraproject.org/rpms/gitit.git /var/lib/mock/f41-build-side-1-2637576-26328/root/chroot_tmpdir/scmroot/gitit
Cloning into '/var/lib/mock/f41-build-side-1-2637576-26328/root/chroot_tmpdir/scmroot/gitit'...
$ git fetch origin fd3a2d996838c6112bba2d69689a2b3fa38af440:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gitit
 * [new ref]         fd3a2d996838c6112bba2d69689a2b3fa38af440 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fd3a2d9 https://hackage.haskell.org/package/gitit-0.15.1.2/changelog