$ git clone -n https://src.fedoraproject.org/rpms/rust-unic-langid-macros.git /var/lib/mock/f45-build-45863-828/root/chroot_tmpdir/scmroot/rust-unic-langid-macros
Cloning into '/var/lib/mock/f45-build-45863-828/root/chroot_tmpdir/scmroot/rust-unic-langid-macros'...
$ git fetch origin dc8a0291fb71697c563e9984b396ab24743011eb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-unic-langid-macros
 * [new ref]         dc8a0291fb71697c563e9984b396ab24743011eb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dc8a029 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild