$ git clone -n https://src.fedoraproject.org/rpms/kf6-kholidays.git /var/lib/mock/f40-build-2485248-61642/root/chroot_tmpdir/scmroot/kf6-kholidays
Cloning into '/var/lib/mock/f40-build-2485248-61642/root/chroot_tmpdir/scmroot/kf6-kholidays'...
$ git fetch origin 917875ff0e07b071ebbdfe85a601b94cf6b10488:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-kholidays
 * [new ref]         917875ff0e07b071ebbdfe85a601b94cf6b10488 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 917875f 6.0.0