$ git clone -n https://src.fedoraproject.org/rpms/rust-png0.17.git /var/lib/mock/f45-build-43988-809/root/chroot_tmpdir/scmroot/rust-png0.17
Cloning into '/var/lib/mock/f45-build-43988-809/root/chroot_tmpdir/scmroot/rust-png0.17'...
$ git fetch origin 08aea026df35727514172d1fcce8ea371f6a2a93:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-png0.17
 * [new ref]         08aea026df35727514172d1fcce8ea371f6a2a93 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 08aea02 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild