$ git clone -n https://src.fedoraproject.org/rpms/rust-unic-ucd-category.git /var/lib/mock/f45-build-45912-829/root/chroot_tmpdir/scmroot/rust-unic-ucd-category
Cloning into '/var/lib/mock/f45-build-45912-829/root/chroot_tmpdir/scmroot/rust-unic-ucd-category'...
$ git fetch origin 071b05bb3c7de4e3dec5990187ba9c0e791ce350:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-unic-ucd-category
 * [new ref]         071b05bb3c7de4e3dec5990187ba9c0e791ce350 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 071b05b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild