$ git clone -n https://src.fedoraproject.org/rpms/rubygem-stringex.git /var/lib/mock/f40-build-2407721-60558/root/chroot_tmpdir/scmroot/rubygem-stringex
Cloning into '/var/lib/mock/f40-build-2407721-60558/root/chroot_tmpdir/scmroot/rubygem-stringex'...
$ git fetch origin c0eab761cc2f2701130243e070cc22a7d91437b5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-stringex
 * [new ref]         c0eab761cc2f2701130243e070cc22a7d91437b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c0eab76 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild