$ git clone -n https://src.fedoraproject.org/rpms/rust-drg.git /var/lib/mock/f40-build-780263-130845/root/chroot_tmpdir/scmroot/rust-drg
Cloning into '/var/lib/mock/f40-build-780263-130845/root/chroot_tmpdir/scmroot/rust-drg'...
$ git fetch origin 5567007e8fc83556e9c0f0c1f03ea082ad822306:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-drg
 * [new ref]         5567007e8fc83556e9c0f0c1f03ea082ad822306 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5567007 Rebuild with package notes