$ git clone -n https://src.fedoraproject.org/rpms/erlang-jiffy.git /var/lib/mock/f38-build-side-42-init-devel-639499-26389/root/chroot_tmpdir/scmroot/erlang-jiffy
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-639499-26389/root/chroot_tmpdir/scmroot/erlang-jiffy'...
$ git fetch origin b4015cf555a07f384dbe3d7b54dfb3dea3ab84ce:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/erlang-jiffy
 * [new ref]         b4015cf555a07f384dbe3d7b54dfb3dea3ab84ce -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b4015cf Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild