$ git clone -n https://src.fedoraproject.org/rpms/rust-get-size2.git /var/lib/mock/f45-build-41867-786/root/chroot_tmpdir/scmroot/rust-get-size2
Cloning into '/var/lib/mock/f45-build-41867-786/root/chroot_tmpdir/scmroot/rust-get-size2'...
$ git fetch origin 7d51ccc6578b8d247cf8a725cf927e8830a811be:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-get-size2
 * [new ref]         7d51ccc6578b8d247cf8a725cf927e8830a811be -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7d51ccc Update to version 0.10.3; Fixes RHBZ#2501150