$ git clone -n https://src.fedoraproject.org/rpms/rust-slog-extlog.git /var/lib/mock/f45-build-45019-820/root/chroot_tmpdir/scmroot/rust-slog-extlog
Cloning into '/var/lib/mock/f45-build-45019-820/root/chroot_tmpdir/scmroot/rust-slog-extlog'...
$ git fetch origin d87fd36d44c73cb86b0f0ac6d5d3040414c56161:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-slog-extlog
 * [new ref]         d87fd36d44c73cb86b0f0ac6d5d3040414c56161 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d87fd36 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild