$ git clone -n https://src.fedoraproject.org/rpms/rubygem-bundler.git /var/lib/mock/f39-build-1458070-33035/root/chroot_tmpdir/scmroot/rubygem-bundler
Cloning into '/var/lib/mock/f39-build-1458070-33035/root/chroot_tmpdir/scmroot/rubygem-bundler'...
$ git fetch origin 30678313534a81ec64033bf5f92906cc005d37e6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-bundler
 * [new ref]         30678313534a81ec64033bf5f92906cc005d37e6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3067831 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild