$ git clone -n https://src.fedoraproject.org/rpms/rust-zvariant.git /var/lib/mock/f45-build-46409-834/root/chroot_tmpdir/scmroot/rust-zvariant
Cloning into '/var/lib/mock/f45-build-46409-834/root/chroot_tmpdir/scmroot/rust-zvariant'...
$ git fetch origin ef676cd8acb500b604639bda7e5c23d99681a5d1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-zvariant
 * [new ref]         ef676cd8acb500b604639bda7e5c23d99681a5d1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef676cd Backport fix for tests on big-endian architectures