$ git clone -n https://src.fedoraproject.org/rpms/rubygem-marcel.git /var/lib/mock/f39-build-1499356-34744/root/chroot_tmpdir/scmroot/rubygem-marcel
Cloning into '/var/lib/mock/f39-build-1499356-34744/root/chroot_tmpdir/scmroot/rubygem-marcel'...
$ git fetch origin 6eedff4e09336ce70ff1d4ccca5bbb633ab58d45:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-marcel
 * [new ref]         6eedff4e09336ce70ff1d4ccca5bbb633ab58d45 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6eedff4 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild