$ git clone -n https://src.fedoraproject.org/rpms/rust-gio.git /var/lib/mock/f38-build-side-43-rust-devel-1397415-31052/root/chroot_tmpdir/scmroot/rust-gio
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1397415-31052/root/chroot_tmpdir/scmroot/rust-gio'...
$ git fetch origin ac0a687d95f33381ef2127feeac5616e87e21fdd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gio
 * [new ref]         ac0a687d95f33381ef2127feeac5616e87e21fdd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ac0a687 Update to version 0.18.2; Fixes RHBZ#2239030