$ git clone -n https://src.fedoraproject.org/rpms/rust-openssl-sys.git /var/lib/mock/f39-build-1521000-35834/root/chroot_tmpdir/scmroot/rust-openssl-sys
Cloning into '/var/lib/mock/f39-build-1521000-35834/root/chroot_tmpdir/scmroot/rust-openssl-sys'...
$ git fetch origin 1aaaeff03698656085ebfe5c46e8f560b0128011:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-openssl-sys
 * [new ref]         1aaaeff03698656085ebfe5c46e8f560b0128011 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1aaaeff Update to version 0.9.93; Fixes RHBZ#2237328