$ git clone -n https://src.fedoraproject.org/rpms/rust-ropey.git /var/lib/mock/f40-build-2288147-55772/root/chroot_tmpdir/scmroot/rust-ropey
Cloning into '/var/lib/mock/f40-build-2288147-55772/root/chroot_tmpdir/scmroot/rust-ropey'...
$ git fetch origin 9ef6a13be5a261186a0561d8d6f0f174a2c2ba88:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ropey
 * [new ref]         9ef6a13be5a261186a0561d8d6f0f174a2c2ba88 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9ef6a13 Update to version 1.6.1 (rhbz#2245088)