$ git clone -n https://src.fedoraproject.org/rpms/kf6-kholidays.git /var/lib/mock/f42-build-861999-170551/root/chroot_tmpdir/scmroot/kf6-kholidays
Cloning into '/var/lib/mock/f42-build-861999-170551/root/chroot_tmpdir/scmroot/kf6-kholidays'...
$ git fetch origin c5a6d919ed2449030394ad70215ac963e51790a3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kholidays
 * [new ref]         c5a6d919ed2449030394ad70215ac963e51790a3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c5a6d91 6.8.0