$ git clone -n https://src.fedoraproject.org/rpms/rust-streebog.git /var/lib/mock/f45-build-45208-821/root/chroot_tmpdir/scmroot/rust-streebog
Cloning into '/var/lib/mock/f45-build-45208-821/root/chroot_tmpdir/scmroot/rust-streebog'...
$ git fetch origin ec084f7e9d0a662f51a3903af8ba76ddfa8bcee6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-streebog
 * [new ref]         ec084f7e9d0a662f51a3903af8ba76ddfa8bcee6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ec084f7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild