$ git clone -n https://src.fedoraproject.org/rpms/rust-liblzma-sys.git /var/lib/mock/f45-build-42935-797/root/chroot_tmpdir/scmroot/rust-liblzma-sys
Cloning into '/var/lib/mock/f45-build-42935-797/root/chroot_tmpdir/scmroot/rust-liblzma-sys'...
$ git fetch origin ea14454d602645057364363298cdfa05cacead86:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-liblzma-sys
 * [new ref]         ea14454d602645057364363298cdfa05cacead86 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea14454 pull in xz-devel to fix builds of dependent packages