$ git clone -n https://src.fedoraproject.org/rpms/rust-varlink.git /var/lib/mock/f40-build-2040602-48369/root/chroot_tmpdir/scmroot/rust-varlink
Cloning into '/var/lib/mock/f40-build-2040602-48369/root/chroot_tmpdir/scmroot/rust-varlink'...
$ git fetch origin 73878e28e1de85a22b4e6fb1b13d8cfb142d379b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-varlink
 * [new ref]         73878e28e1de85a22b4e6fb1b13d8cfb142d379b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 73878e2 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild