$ git clone -n https://src.fedoraproject.org/rpms/rust-scroll0.12.git /var/lib/mock/f45-build-44695-816/root/chroot_tmpdir/scmroot/rust-scroll0.12
Cloning into '/var/lib/mock/f45-build-44695-816/root/chroot_tmpdir/scmroot/rust-scroll0.12'...
$ git fetch origin 5dedfcba89d4226cbc3c36aadf58995b73d2043c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-scroll0.12
 * [new ref]         5dedfcba89d4226cbc3c36aadf58995b73d2043c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5dedfcb Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild