$ git clone -n https://src.fedoraproject.org/rpms/rubygem-puma.git /var/lib/mock/f42-build-865344-173025/root/chroot_tmpdir/scmroot/rubygem-puma
Cloning into '/var/lib/mock/f42-build-865344-173025/root/chroot_tmpdir/scmroot/rubygem-puma'...
$ git fetch origin 61c0f41a5f7e9eec98d4a5bda0fbe87d31647d7d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-puma
 * [new ref]         61c0f41a5f7e9eec98d4a5bda0fbe87d31647d7d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 61c0f41 Rebuilt for https://fedoraproject.org/wiki/Changes/Ruby_3.4