$ git clone -n https://src.fedoraproject.org/rpms/rubygem-rspec-support.git /var/lib/mock/f38-build-side-42-init-devel-629778-26375/root/chroot_tmpdir/scmroot/rubygem-rspec-support
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-629778-26375/root/chroot_tmpdir/scmroot/rubygem-rspec-support'...
$ git fetch origin 388b69049e03d0413746d2809b799e6b29d2550e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-rspec-support
 * [new ref]         388b69049e03d0413746d2809b799e6b29d2550e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 388b690 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild