$ git clone -n https://src.fedoraproject.org/rpms/rust-webbrowser.git /var/lib/mock/f45-build-46156-831/root/chroot_tmpdir/scmroot/rust-webbrowser
Cloning into '/var/lib/mock/f45-build-46156-831/root/chroot_tmpdir/scmroot/rust-webbrowser'...
$ git fetch origin ad53cdc6e0e790cf9a7bdea406a6840353877889:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-webbrowser
 * [new ref]         ad53cdc6e0e790cf9a7bdea406a6840353877889 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ad53cdc Update to version 1.2.4; Fixes RHBZ#2437496