$ git clone -n https://src.fedoraproject.org/rpms/rust-cfb.git /var/lib/mock/f38-build-side-42-init-devel-1395417-31050/root/chroot_tmpdir/scmroot/rust-cfb
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1395417-31050/root/chroot_tmpdir/scmroot/rust-cfb'...
$ git fetch origin 307f1c6f6ddc75d09bb00c06aaf005ec2fecb948:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cfb
 * [new ref]         307f1c6f6ddc75d09bb00c06aaf005ec2fecb948 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 307f1c6 Update to version 0.7.3; Fixes RHBZ#2082910