$ git clone -n https://src.fedoraproject.org/rpms/unicode-ucd.git /var/lib/mock/f42-build-side-1-3583672-46890/root/chroot_tmpdir/scmroot/unicode-ucd
Cloning into '/var/lib/mock/f42-build-side-1-3583672-46890/root/chroot_tmpdir/scmroot/unicode-ucd'...
$ git fetch origin 129ec51c4d491635426e2e9c5460c9076048d5ca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/unicode-ucd
 * [new ref]         129ec51c4d491635426e2e9c5460c9076048d5ca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 129ec51 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild