$ git clone -n https://src.fedoraproject.org/rpms/rust-supports-unicode.git /var/lib/mock/f45-build-45326-822/root/chroot_tmpdir/scmroot/rust-supports-unicode
Cloning into '/var/lib/mock/f45-build-45326-822/root/chroot_tmpdir/scmroot/rust-supports-unicode'...
$ git fetch origin a44b55ec93a1e5fd01fc678160f0b1241964e32b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-supports-unicode
 * [new ref]         a44b55ec93a1e5fd01fc678160f0b1241964e32b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a44b55e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild