$ git clone -n https://src.fedoraproject.org/rpms/rust-pem-rfc7468.git /var/lib/mock/f45-build-43764-805/root/chroot_tmpdir/scmroot/rust-pem-rfc7468
Cloning into '/var/lib/mock/f45-build-43764-805/root/chroot_tmpdir/scmroot/rust-pem-rfc7468'...
$ git fetch origin c72396f81d635b046b0b01a7e3554c312f77eb58:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pem-rfc7468
 * [new ref]         c72396f81d635b046b0b01a7e3554c312f77eb58 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c72396f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild