$ git clone -n https://src.fedoraproject.org/rpms/rust-gix-config.git /var/lib/mock/f41-build-side-1-3006138-36735/root/chroot_tmpdir/scmroot/rust-gix-config
Cloning into '/var/lib/mock/f41-build-side-1-3006138-36735/root/chroot_tmpdir/scmroot/rust-gix-config'...
$ git fetch origin 9ee549702b1cca5d96fd268704a4fb875c68cc9e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gix-config
 * [new ref]         9ee549702b1cca5d96fd268704a4fb875c68cc9e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9ee5497 Update to version 0.40.0 (rhbz#2299565)