$ git clone -n https://src.fedoraproject.org/rpms/rust-git-delta.git /var/lib/mock/f39-build-1888984-42792/root/chroot_tmpdir/scmroot/rust-git-delta
Cloning into '/var/lib/mock/f39-build-1888984-42792/root/chroot_tmpdir/scmroot/rust-git-delta'...
$ git fetch origin b9de5f3a08bf5043771c849ea37228466f292ec4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-git-delta
 * [new ref]         b9de5f3a08bf5043771c849ea37228466f292ec4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b9de5f3 Rebuilt for bat 0.24.0