$ git clone -n https://src.fedoraproject.org/rpms/rubygem-bson.git /var/lib/mock/f39-build-1458064-33035/root/chroot_tmpdir/scmroot/rubygem-bson
Cloning into '/var/lib/mock/f39-build-1458064-33035/root/chroot_tmpdir/scmroot/rubygem-bson'...
$ git fetch origin d646a534dbcd217977f380c63b8746183e889559:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-bson
 * [new ref]         d646a534dbcd217977f380c63b8746183e889559 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d646a53 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild