$ git clone -n https://src.fedoraproject.org/rpms/glycin-loaders.git /var/lib/mock/f40-build-2479206-61612/root/chroot_tmpdir/scmroot/glycin-loaders
Cloning into '/var/lib/mock/f40-build-2479206-61612/root/chroot_tmpdir/scmroot/glycin-loaders'...
$ git fetch origin c02983a70ce0a54fe1c202eced314c9198e05549:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/glycin-loaders
 * [new ref]         c02983a70ce0a54fe1c202eced314c9198e05549 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c02983a Update Rust macro usage