$ git clone -n https://src.fedoraproject.org/rpms/rust-glutin.git /var/lib/mock/f40-build-2156797-50920/root/chroot_tmpdir/scmroot/rust-glutin
Cloning into '/var/lib/mock/f40-build-2156797-50920/root/chroot_tmpdir/scmroot/rust-glutin'...
$ git fetch origin ac25a3ef93d7bb0e813113aaa0526bf17d3fbdfb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-glutin
 * [new ref]         ac25a3ef93d7bb0e813113aaa0526bf17d3fbdfb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ac25a3e Update to version 0.30.10; Fixes RHBZ#2229440