$ git clone -n https://src.fedoraproject.org/rpms/rust-rstest.git /var/lib/mock/f38-build-side-43-rust-devel-1404872-31204/root/chroot_tmpdir/scmroot/rust-rstest
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1404872-31204/root/chroot_tmpdir/scmroot/rust-rstest'...
$ git fetch origin 6561faa432dd0a3146521eb9a0e2bb7b5a331e6c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-rstest
 * [new ref]         6561faa432dd0a3146521eb9a0e2bb7b5a331e6c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6561faa Update to version 0.18.2; Fixes RHBZ#2219708