$ git clone -n https://src.fedoraproject.org/rpms/rust-retry1.git /var/lib/mock/f41-build-1283260-23209/root/chroot_tmpdir/scmroot/rust-retry1
Cloning into '/var/lib/mock/f41-build-1283260-23209/root/chroot_tmpdir/scmroot/rust-retry1'...
$ git fetch origin 21e3b2dd58f4a701e51c2985388d69e246b640f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-retry1
 * [new ref]         21e3b2dd58f4a701e51c2985388d69e246b640f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 21e3b2d compat package no longer needed