$ git clone -n https://src.fedoraproject.org/rpms/centpkg.git /var/lib/mock/f42-build-3272210-41305/root/chroot_tmpdir/scmroot/centpkg
Cloning into '/var/lib/mock/f42-build-3272210-41305/root/chroot_tmpdir/scmroot/centpkg'...
$ git fetch origin 6b7297d7baff92edcea1862e35fecff6d8572a58:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/centpkg
 * [new ref]         6b7297d7baff92edcea1862e35fecff6d8572a58 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6b7297d Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild