$ git clone -n https://src.fedoraproject.org/rpms/gitit.git /var/lib/mock/f42-build-3251830-41222/root/chroot_tmpdir/scmroot/gitit
Cloning into '/var/lib/mock/f42-build-3251830-41222/root/chroot_tmpdir/scmroot/gitit'...
$ git fetch origin 98719621cc54fb6e4706cccc643a2b5f9e7b8aa5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gitit
 * [new ref]         98719621cc54fb6e4706cccc643a2b5f9e7b8aa5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9871962 Add sysusers.d config file to allow rpm to create users/groups automatically