$ git clone -n https://src.fedoraproject.org/rpms/rust-cvss.git /var/lib/mock/f45-build-41127-779/root/chroot_tmpdir/scmroot/rust-cvss
Cloning into '/var/lib/mock/f45-build-41127-779/root/chroot_tmpdir/scmroot/rust-cvss'...
$ git fetch origin 2e167ab208ea00421bc6a13a9eb58e2829c01ce7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-cvss
 * [new ref]         2e167ab208ea00421bc6a13a9eb58e2829c01ce7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2e167ab Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild