$ git clone -n https://src.fedoraproject.org/rpms/rubygem-jekyll.git /var/lib/mock/f39-build-1541468-36494/root/chroot_tmpdir/scmroot/rubygem-jekyll
Cloning into '/var/lib/mock/f39-build-1541468-36494/root/chroot_tmpdir/scmroot/rubygem-jekyll'...
$ git fetch origin 9cb5367fa3f20fa7eba2bade1c48cccdb695c0dc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-jekyll
 * [new ref]         9cb5367fa3f20fa7eba2bade1c48cccdb695c0dc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9cb5367 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild