$ git clone -n https://src.fedoraproject.org/rpms/rubygem-chronic.git /var/lib/mock/f39-build-1458098-33035/root/chroot_tmpdir/scmroot/rubygem-chronic
Cloning into '/var/lib/mock/f39-build-1458098-33035/root/chroot_tmpdir/scmroot/rubygem-chronic'...
$ git fetch origin f0472f678cc34d52fe0a6c3fd0d918c200d04eeb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-chronic
 * [new ref]         f0472f678cc34d52fe0a6c3fd0d918c200d04eeb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f0472f6 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild