$ git clone -n https://src.fedoraproject.org/rpms/rust-openssl-sys.git /var/lib/mock/f45-build-43558-804/root/chroot_tmpdir/scmroot/rust-openssl-sys
Cloning into '/var/lib/mock/f45-build-43558-804/root/chroot_tmpdir/scmroot/rust-openssl-sys'...
$ git fetch origin 50592103e95cd63854c04763d15510df15d0c381:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-openssl-sys
 * [new ref]         50592103e95cd63854c04763d15510df15d0c381 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5059210 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild