$ git clone -n https://src.fedoraproject.org/rpms/rubygem-execjs.git /var/lib/mock/f40-build-2080721-49724/root/chroot_tmpdir/scmroot/rubygem-execjs
Cloning into '/var/lib/mock/f40-build-2080721-49724/root/chroot_tmpdir/scmroot/rubygem-execjs'...
$ git fetch origin d7c97cbe7e5be46e29348e7b64ed3d39f11e42cf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-execjs
 * [new ref]         d7c97cbe7e5be46e29348e7b64ed3d39f11e42cf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d7c97cb Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild