$ git clone -n https://src.fedoraproject.org/rpms/rust-asn1-rs-impl.git /var/lib/mock/f45-build-40189-769/root/chroot_tmpdir/scmroot/rust-asn1-rs-impl
Cloning into '/var/lib/mock/f45-build-40189-769/root/chroot_tmpdir/scmroot/rust-asn1-rs-impl'...
$ git fetch origin ffed473fc158713d74053c3acdfa0f88412ca8bf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-asn1-rs-impl
 * [new ref]         ffed473fc158713d74053c3acdfa0f88412ca8bf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ffed473 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild