$ git clone -n https://src.fedoraproject.org/rpms/rust-roff0.1.git /var/lib/mock/f38-build-side-42-init-devel-1396412-31050/root/chroot_tmpdir/scmroot/rust-roff0.1
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1396412-31050/root/chroot_tmpdir/scmroot/rust-roff0.1'...
$ git fetch origin 4a72c1f4e5d249f3ee663762a7bba3b971d7df10:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-roff0.1
 * [new ref]         4a72c1f4e5d249f3ee663762a7bba3b971d7df10 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4a72c1f Initial import (roff 0.1 compat package)