$ git clone -n https://src.fedoraproject.org/rpms/rust-quick-error1.git /var/lib/mock/f45-build-44175-811/root/chroot_tmpdir/scmroot/rust-quick-error1
Cloning into '/var/lib/mock/f45-build-44175-811/root/chroot_tmpdir/scmroot/rust-quick-error1'...
$ git fetch origin c510e813f1ef6a8e7fd7f0e66be7316c0fe89c22:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-quick-error1
 * [new ref]         c510e813f1ef6a8e7fd7f0e66be7316c0fe89c22 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c510e81 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild