$ git clone -n https://src.fedoraproject.org/rpms/rust-regex-syntax.git /var/lib/mock/f45-build-44394-813/root/chroot_tmpdir/scmroot/rust-regex-syntax
Cloning into '/var/lib/mock/f45-build-44394-813/root/chroot_tmpdir/scmroot/rust-regex-syntax'...
$ git fetch origin 82177959d31d07960b721944f27896037c960156:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-regex-syntax
 * [new ref]         82177959d31d07960b721944f27896037c960156 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8217795 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild