$ git clone -n https://src.fedoraproject.org/rpms/rust-gio0.17.git /var/lib/mock/f41-build-side-1-2954365-35544/root/chroot_tmpdir/scmroot/rust-gio0.17
Cloning into '/var/lib/mock/f41-build-side-1-2954365-35544/root/chroot_tmpdir/scmroot/rust-gio0.17'...
$ git fetch origin 8d6764ccf23a67cb1b9a145d729a91e6ff58d601:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gio0.17
 * [new ref]         8d6764ccf23a67cb1b9a145d729a91e6ff58d601 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8d6764c compat package no longer needed