$ git clone -n https://src.fedoraproject.org/rpms/rust-directories3.git /var/lib/mock/f39-build-1516997-35672/root/chroot_tmpdir/scmroot/rust-directories3
Cloning into '/var/lib/mock/f39-build-1516997-35672/root/chroot_tmpdir/scmroot/rust-directories3'...
$ git fetch origin 4b3e5bab50fdb4653d83972056a193c5531a3074:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-directories3
 * [new ref]         4b3e5bab50fdb4653d83972056a193c5531a3074 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b3e5ba Regenerate with rust2rpm v24