$ git clone -n https://src.fedoraproject.org/rpms/asc.git /var/lib/mock/f39-build-1521144-35836/root/chroot_tmpdir/scmroot/asc
Cloning into '/var/lib/mock/f39-build-1521144-35836/root/chroot_tmpdir/scmroot/asc'...
$ git fetch origin 2f969075b1a41dcc21948a9d7acfa7bac125b251:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/asc
 * [new ref]         2f969075b1a41dcc21948a9d7acfa7bac125b251 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2f96907 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild