$ git clone -n https://src.fedoraproject.org/rpms/rust-gio.git /var/lib/mock/f42-build-side-1-3572272-46757/root/chroot_tmpdir/scmroot/rust-gio
Cloning into '/var/lib/mock/f42-build-side-1-3572272-46757/root/chroot_tmpdir/scmroot/rust-gio'...
$ git fetch origin 291ececdfd4985e8e0391b7bad12712bc48de191:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gio
 * [new ref]         291ececdfd4985e8e0391b7bad12712bc48de191 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 291ecec Update to version 0.20.11; Fixes RHBZ#2365893