$ git clone -n https://src.fedoraproject.org/rpms/rust-byte-unit4.git /var/lib/mock/f45-build-40548-773/root/chroot_tmpdir/scmroot/rust-byte-unit4
Cloning into '/var/lib/mock/f45-build-40548-773/root/chroot_tmpdir/scmroot/rust-byte-unit4'...
$ git fetch origin 45781b6bf54b4a54f687a71edabbcaeaca05aa3f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-byte-unit4
 * [new ref]         45781b6bf54b4a54f687a71edabbcaeaca05aa3f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 45781b6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild