$ git clone -n https://src.fedoraproject.org/rpms/autogen.git /var/lib/mock/f38-build-side-42-init-devel-622361-26353/root/chroot_tmpdir/scmroot/autogen
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-622361-26353/root/chroot_tmpdir/scmroot/autogen'...
$ git fetch origin 8121d6a596c6ed0a445ea91ba1a830d221712d88:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/autogen
 * [new ref]         8121d6a596c6ed0a445ea91ba1a830d221712d88 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8121d6a Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild