$ git clone -n https://src.fedoraproject.org/rpms/rust-implib.git /var/lib/mock/f45-build-42537-794/root/chroot_tmpdir/scmroot/rust-implib
Cloning into '/var/lib/mock/f45-build-42537-794/root/chroot_tmpdir/scmroot/rust-implib'...
$ git fetch origin 4f9b68f1240ff290da87815bbc57ecfb80353f00:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-implib
 * [new ref]         4f9b68f1240ff290da87815bbc57ecfb80353f00 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4f9b68f Update to version 0.6.0; Fixes RHBZ#2460607