$ git clone -n https://src.fedoraproject.org/rpms/rubygem-mechanize.git /var/lib/mock/f38-build-side-42-init-devel-792054-28006/root/chroot_tmpdir/scmroot/rubygem-mechanize
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-792054-28006/root/chroot_tmpdir/scmroot/rubygem-mechanize'...
$ git fetch origin c9f7451d0cfe479f0056283a0fdac15162ac8b9e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-mechanize
 * [new ref]         c9f7451d0cfe479f0056283a0fdac15162ac8b9e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c9f7451 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild