$ git clone -n https://src.fedoraproject.org/rpms/kf6-kholidays.git /var/lib/mock/f42-build-867693-175757/root/chroot_tmpdir/scmroot/kf6-kholidays
Cloning into '/var/lib/mock/f42-build-867693-175757/root/chroot_tmpdir/scmroot/kf6-kholidays'...
$ git fetch origin de09c3773d46f6e39273d4a1aa906d95d0a208d5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kholidays
 * [new ref]         de09c3773d46f6e39273d4a1aa906d95d0a208d5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at de09c37 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild