$ git clone -n https://src.fedoraproject.org/rpms/kf6-kunitconversion.git /var/lib/mock/f42-build-862032-170551/root/chroot_tmpdir/scmroot/kf6-kunitconversion
Cloning into '/var/lib/mock/f42-build-862032-170551/root/chroot_tmpdir/scmroot/kf6-kunitconversion'...
$ git fetch origin 7b0b839ed911c9c80d83ad3c89bfbce5e6357fdf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kunitconversion
 * [new ref]         7b0b839ed911c9c80d83ad3c89bfbce5e6357fdf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7b0b839 6.8.0