$ git clone -n https://src.fedoraproject.org/rpms/khelpcenter.git /var/lib/mock/f39-build-1545483-36691/root/chroot_tmpdir/scmroot/khelpcenter
Cloning into '/var/lib/mock/f39-build-1545483-36691/root/chroot_tmpdir/scmroot/khelpcenter'...
$ git fetch origin 784a7832eb036d7e81d202bda5b16aeda07b2dc0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/khelpcenter
 * [new ref]         784a7832eb036d7e81d202bda5b16aeda07b2dc0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 784a783 23.08.2