$ git clone -n https://src.fedoraproject.org/rpms/rust-gio.git /var/lib/mock/f41-build-side-1-2907299-34727/root/chroot_tmpdir/scmroot/rust-gio
Cloning into '/var/lib/mock/f41-build-side-1-2907299-34727/root/chroot_tmpdir/scmroot/rust-gio'...
$ git fetch origin 8e8a2684e88f13a5afc595a544b2dc5e2a742e47:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gio
 * [new ref]         8e8a2684e88f13a5afc595a544b2dc5e2a742e47 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8e8a268 Update to version 0.20.4; Fixes RHBZ#2314865