$ git clone -n https://src.fedoraproject.org/rpms/rust-blake3.git /var/lib/mock/f40-build-2259934-54391/root/chroot_tmpdir/scmroot/rust-blake3
Cloning into '/var/lib/mock/f40-build-2259934-54391/root/chroot_tmpdir/scmroot/rust-blake3'...
$ git fetch origin 7dd2962cf0e787b27597dd8c7647d79cb5fdf508:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-blake3
 * [new ref]         7dd2962cf0e787b27597dd8c7647d79cb5fdf508 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7dd2962 Update to 1.5.0