$ git clone -n https://src.fedoraproject.org/rpms/rust-unicase.git /var/lib/mock/f39-build-1445543-32653/root/chroot_tmpdir/scmroot/rust-unicase
Cloning into '/var/lib/mock/f39-build-1445543-32653/root/chroot_tmpdir/scmroot/rust-unicase'...
$ git fetch origin a8abe819294d3b8841096c69c15c8e9356a82dc7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-unicase
 * [new ref]         a8abe819294d3b8841096c69c15c8e9356a82dc7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a8abe81 Update to version 2.7.0; Fixes RHBZ#2233337