$ git clone -n https://src.fedoraproject.org/rpms/rust-unic-locale-macros-impl.git /var/lib/mock/f45-build-45879-828/root/chroot_tmpdir/scmroot/rust-unic-locale-macros-impl
Cloning into '/var/lib/mock/f45-build-45879-828/root/chroot_tmpdir/scmroot/rust-unic-locale-macros-impl'...
$ git fetch origin 61155a6919dccc6d0774cc777c26cd1f5c267d1f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-unic-locale-macros-impl
 * [new ref]         61155a6919dccc6d0774cc777c26cd1f5c267d1f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 61155a6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild