$ git clone -n https://src.fedoraproject.org/rpms/rust-fancy-regex.git /var/lib/mock/f38-build-side-43-rust-devel-1413088-31443/root/chroot_tmpdir/scmroot/rust-fancy-regex
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1413088-31443/root/chroot_tmpdir/scmroot/rust-fancy-regex'...
$ git fetch origin 5f1684e703c69547132710419468f47923df01cc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-fancy-regex
 * [new ref]         5f1684e703c69547132710419468f47923df01cc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5f1684e Update to 0.11.0