$ git clone -n https://src.fedoraproject.org/rpms/createrepo_c.git /var/lib/mock/f41-build-side-1-2811115-32926/root/chroot_tmpdir/scmroot/createrepo_c
Cloning into '/var/lib/mock/f41-build-side-1-2811115-32926/root/chroot_tmpdir/scmroot/createrepo_c'...
$ git fetch origin e0d0a3d1626b1bcf7128f9cf3d400a1ce2933b48:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/createrepo_c
 * [new ref]         e0d0a3d1626b1bcf7128f9cf3d400a1ce2933b48 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e0d0a3d Correct a changelog history