$ git clone -n https://src.fedoraproject.org/rpms/kf5-purpose.git /var/lib/mock/f38-build-717681-96586/root/chroot_tmpdir/scmroot/kf5-purpose
Cloning into '/var/lib/mock/f38-build-717681-96586/root/chroot_tmpdir/scmroot/kf5-purpose'...
$ git fetch origin c4f0bdb33f21ce25535267d9d8ce7179825284df:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-purpose
 * [new ref]         c4f0bdb33f21ce25535267d9d8ce7179825284df -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c4f0bdb 5.106.0