$ git clone -n https://src.fedoraproject.org/rpms/rust-rc2.git /var/lib/mock/f41-build-side-1-2993483-36026/root/chroot_tmpdir/scmroot/rust-rc2
Cloning into '/var/lib/mock/f41-build-side-1-2993483-36026/root/chroot_tmpdir/scmroot/rust-rc2'...
$ git fetch origin 07a8c76b38c5f7562a37ce1ea5f47d5281b15c0f:KOJI_FETCH_HEAD
fatal: unable to access 'https://src.fedoraproject.org/rpms/rust-rc2.git/': OpenSSL SSL_connect: SSL_ERROR_SYSCALL in connection to src.fedoraproject.org:443 
$ git reset --hard 07a8c76b38c5f7562a37ce1ea5f47d5281b15c0f
HEAD is now at 07a8c76 Initial import; Fixes: RHBZ#2296110