$ git clone -n https://src.fedoraproject.org/rpms/rust-gufo-tiff.git /var/lib/mock/f45-build-42202-791/root/chroot_tmpdir/scmroot/rust-gufo-tiff
Cloning into '/var/lib/mock/f45-build-42202-791/root/chroot_tmpdir/scmroot/rust-gufo-tiff'...
$ git fetch origin 8c35b47fc3ce42c0a56865da5fac48f00dec0e1f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gufo-tiff
 * [new ref]         8c35b47fc3ce42c0a56865da5fac48f00dec0e1f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c35b47 Update to version 0.5.0; Fixes RHBZ#2529504