$ git clone -n https://src.fedoraproject.org/rpms/kf5-kinit.git /var/lib/mock/f45-build-14850-464/root/chroot_tmpdir/scmroot/kf5-kinit
Cloning into '/var/lib/mock/f45-build-14850-464/root/chroot_tmpdir/scmroot/kf5-kinit'...
$ git fetch origin bd794348115aeb5fa4fb54e76b79947014a990c5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kinit
 * [new ref]         bd794348115aeb5fa4fb54e76b79947014a990c5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bd79434 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild