$ git clone -n https://src.fedoraproject.org/rpms/rubygem-puma.git /var/lib/mock/f40-build-2224209-52771/root/chroot_tmpdir/scmroot/rubygem-puma
Cloning into '/var/lib/mock/f40-build-2224209-52771/root/chroot_tmpdir/scmroot/rubygem-puma'...
$ git fetch origin 327b5ad9449875b8349c1b71aae0e82399a4d60c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-puma
 * [new ref]         327b5ad9449875b8349c1b71aae0e82399a4d60c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 327b5ad Rebuilt for https://fedoraproject.org/wiki/Changes/Ruby_3.3