$ git clone -n https://src.fedoraproject.org/rpms/rust-unicode-bom.git /var/lib/mock/f45-build-45909-829/root/chroot_tmpdir/scmroot/rust-unicode-bom
Cloning into '/var/lib/mock/f45-build-45909-829/root/chroot_tmpdir/scmroot/rust-unicode-bom'...
$ git fetch origin f787d0828b29deb2b25cdc443c8fa6c5db6c3f4b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-unicode-bom
 * [new ref]         f787d0828b29deb2b25cdc443c8fa6c5db6c3f4b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f787d08 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild