$ git clone -n https://src.fedoraproject.org/rpms/rust-glib-sys.git /var/lib/mock/f42-build-side-1-3583708-46890/root/chroot_tmpdir/scmroot/rust-glib-sys
Cloning into '/var/lib/mock/f42-build-side-1-3583708-46890/root/chroot_tmpdir/scmroot/rust-glib-sys'...
$ git fetch origin 02158a94ffaa0f9afa658262467c86c2af715198:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-glib-sys
 * [new ref]         02158a94ffaa0f9afa658262467c86c2af715198 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 02158a9 Update to version 0.20.10; Fixes RHBZ#2365832