$ git clone -n https://src.fedoraproject.org/rpms/perl-Package-Generator.git /var/lib/mock/f40-build-2628464-65465/root/chroot_tmpdir/scmroot/perl-Package-Generator
Cloning into '/var/lib/mock/f40-build-2628464-65465/root/chroot_tmpdir/scmroot/perl-Package-Generator'...
$ git fetch origin b95cf31307e17337d1289a5759b2d3967ebfadd9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Package-Generator
 * [new ref]         b95cf31307e17337d1289a5759b2d3967ebfadd9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b95cf31 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild